I am going to use a tiny Ag in my system. Activity = 1E-10. Geochemistry Question: Is the solubility of Ag controlled by pH? To solve the problem, let’s build a activity diagram for Ag with Geochemist’s Workbench. Command to use: Act2> diagram Ag+ on Ag+ vs pH Act2> Explain Ag+ Ag+: aqueous species mole […]
I often use the “Explain” command to learn more about a mineral in the thermo.dat database. But sometimes it would return an error message. Rxn> Explain Anorthite Anorthite: CaAl2Si2O8 feldspar mole weight = 278.209 g/mol molar volume = 100.790 cm3/mol, density = 2.760 g/cm3 Rxn> Explain Albite Albite: NaAlSi3O8 feldspar mole weight = 262.223 g/mol […]
Follow their official user manual. I think they need to provide some more detailed examples in their manual. I use this cheat sheet for my own use a lot. Review, update and share any comments. Commands that works ACTIVITY To assign activity, use “activity” or “a” followed by constituent name. Rxn> activity Ca++ = […]
I am going to talk about molarity (moles/L) , mili-equivalent/L and equivalent weight today. My approach is to get you what you need from common geochemical analysis report from various labs in the US. In general, when you analyze for quality, depending on the lab and the parameters of interest, you may use units such […]
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Hi all. Today I will demonstrate how to develop a simple GUI tool for calculating discharge, specific discharge and average linear velocity using Python. I will be using codeskulptor as my online tool. Make sure that you are NOT using internet explorer to run the program. Darcy’s Law is the most basic groundwater equation that […]
Washington, DC – The U.S. Environmental Protection Agency (EPA) has appointed Dr. Francesca Grifo as the agency’s new scientific integrity official. Dr. Grifo’s responsibilities in her new role include coordinating and carrying out EPA’s scientific integrity policy and chairing a standing EPA scientific integrity committee. “Science is, and continues, to be the backbone of this agency […]
For a long time I wanted to develop a GUI to calculate Eh based on the Nernst Equation. Finally I have got the most commonly used couple Fe+3/Fe+2 working great in my new GUI geochemistry tool using Python. What you need: Chemical analysis of the solution of interest with data for Total and Dissolved Fe. […]